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use crate::{
    config::{Config, DBType},
    db::{google::GoogleClient, memory::MemoryDB, remote::RemoteDBClient, DB},
    list_ui, map_record, process_ui_command,
    record::{Record, RecurringRecord},
    time::now,
};
use anyhow::Result;
use ratatui::widgets::*;
use std::{sync::Arc, time::Duration};
use tokio::sync::Mutex;

#[derive(Debug, Clone, Default)]
pub struct State<'a> {
    pub records: Vec<Record>,
    pub recurring_records: Vec<RecurringRecord>,
    pub list_type: super::types::ListType,
    pub notification: Option<(String, chrono::NaiveDateTime)>,
    pub line_buf: String,
    pub command: Option<super::types::CommandType>,
    pub show: Option<Record>,
    pub show_recurring: Option<RecurringRecord>,
    pub calendar: Option<(Arc<Table<'a>>, chrono::NaiveDateTime)>,
    pub events: Option<(Arc<Table<'a>>, chrono::NaiveDateTime)>,
    pub redraw: bool,
    pub block_ui: bool,
}

#[derive(Debug, Clone, Default)]
pub struct ProtectedState<'a>(Arc<Mutex<State<'a>>>);

impl<'a> std::ops::Deref for ProtectedState<'a> {
    type Target = Arc<Mutex<State<'a>>>;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl<'a> ProtectedState<'a> {
    pub fn google_db(&self, config: Config) -> Result<RemoteDBClient<GoogleClient>> {
        let client = GoogleClient::new(config.clone())?;

        Ok(RemoteDBClient::new(config.calendar_id(), client.clone()))
    }

    pub fn memory_db(&self) -> Result<MemoryDB> {
        Ok(MemoryDB::new())
    }

    pub async fn list_google_recurring(&self, config: Config) -> Result<Vec<RecurringRecord>> {
        let mut db = self.google_db(config)?;
        db.load().await?;
        let res = db.list_recurrence().await?;
        db.dump().await?;
        Ok(res)
    }

    pub async fn list_file_recurring(&self) -> Result<Vec<RecurringRecord>> {
        let mut db = self.memory_db()?;
        db.load().await?;
        let res = db.list_recurrence().await?;
        db.dump().await?;
        Ok(res)
    }

    pub async fn list_google(
        &self,
        config: Config,
        list_type: super::types::ListType,
    ) -> Result<Vec<Record>> {
        let mut db = self.google_db(config)?;
        list_ui!(db, list_type)
    }

    pub async fn list_file(&self, list_type: super::types::ListType) -> Result<Vec<Record>> {
        let mut db = self.memory_db()?;
        list_ui!(db, list_type)
    }

    pub async fn command_google(&self, config: Config) -> Result<()> {
        let client = GoogleClient::new(config.clone())?;

        let mut db = RemoteDBClient::new(config.calendar_id(), client.clone());
        process_ui_command!(self, db, config);
        Ok(())
    }

    pub async fn command_file(&self, config: Config) -> Result<()> {
        let mut db = MemoryDB::new();
        process_ui_command!(self, db, config);
        Ok(())
    }

    pub async fn get_google(&self, config: Config, id: u64) -> Result<Record> {
        let client = GoogleClient::new(config.clone())?;

        let mut db = RemoteDBClient::new(config.calendar_id(), client.clone());
        map_record!(db, id)
    }

    pub async fn get_file(&self, id: u64) -> Result<Record> {
        let mut db = MemoryDB::new();
        map_record!(db, id)
    }

    pub async fn get_recurring_google(&self, config: Config, id: u64) -> Result<RecurringRecord> {
        let client = GoogleClient::new(config.clone())?;

        let mut db = RemoteDBClient::new(config.calendar_id(), client.clone());
        map_record!(db, id, true)
    }

    pub async fn get_recurring_file(&self, id: u64) -> Result<RecurringRecord> {
        let mut db = MemoryDB::new();
        map_record!(db, id, true)
    }

    pub async fn update_state(&self) -> Result<()> {
        let config = Config::load(None).unwrap_or_default();

        let typ = config.db_type();

        match typ {
            DBType::UnixFile => self.command_file(config.clone()).await,
            DBType::Google => self.command_google(config.clone()).await,
        }
        .expect("Could not execute command");

        let list_type = self.lock().await.list_type.clone();

        if matches!(list_type, super::types::ListType::Recurring) {
            let mut list = match typ {
                DBType::UnixFile => self.list_file_recurring().await,
                DBType::Google => self.list_google_recurring(config).await,
            }
            .expect("Could not read DB");

            let mut inner = self.lock().await;
            inner.recurring_records.clear();
            inner.recurring_records.append(&mut list);
            inner.redraw = true;
        } else {
            let mut list = match typ {
                DBType::UnixFile => self.list_file(list_type).await,
                DBType::Google => self.list_google(config, list_type).await,
            }
            .expect("Could not read DB");

            list.sort_by(crate::record::sort_records);
            let mut inner = self.lock().await;
            inner.records.clear();
            inner.records.append(&mut list);
            inner.redraw = true;
        }

        Ok(())
    }

    pub async fn refresh(&self) -> Result<()> {
        loop {
            self.update_state().await?;
            tokio::time::sleep(Duration::new(60, 0)).await;
        }
    }

    pub async fn add_notification(&self, notification: &str) {
        self.lock().await.notification = Some((notification.to_string(), now().naive_local()))
    }
}